Riveting-machine



(No Model.)

R. A. CARL.

RIVBTING MACHINE.

No. 455,167. 2 Patented June 30,1891. Z 2 I WITNESSES: l/VVE/VTOH:

Arm/Mfrs UNITED STATES PATENT OFFICE.

REINHOLD A. CARL, OF HEARNE, TEXAS.

RlVETlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 455,167, dated June 30, 1891.

Application filed August 30, 1890. Serial No. 363,504, (No model.)

To all whom it may concern:

Be it known that I, REINHoLn A. CARL, of Hearne, in the county of Robertson and State of Texas, have invented a new and Improved Riveting-Vlachine, of which the following is a full, clear, and exact description.

My invention relates to improvements in that class of riveting-machines which are used for. driving rivets in leather and other flexible material, and my invention is especially adapted to driving a pointed rivet instead of the ordinary blunt rivet.

The object of my invention is to produce a machine of simple construction that is cheap, strong, and durable and by means of which rivets may be rapidly set in the material to be riveted,the rivetbeing driven and headed at the same operation and without first punching holes in the material to be riveted.

To this end my invention consists in certain features of construction and combinations of parts, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of a rivetingmachine embodying myinvention. Fig. 2 is a broken enlarged vertical section of the same on the line 2 2 of Fig. 1. Fig. 3 is a broken detailed sectional View showing the connec tion between one of the main levers and the arm connected with the burr-set. Fig. 4 is a broken detailed sectional view of the lower plunger and rivet-holding sleeve. Fig. 5 is a horizontal section through the burr-set and upper plunger on the line 5 5 of Fig. 2, and

Fig. 6 is a detailed plan view of the burrholder.

The frame of the machine consists of the column A and the hollow frame B, which is mounted thereon. The frame B is provided with two forwardly-extending and verticallyaligning arms B, which thus form a horizontal opening G in the frame B. The lower arm B has its upper surface formed into a table I), and the upper arm is provided at its outer extremity with aligning cross-heads b and 12 which carry the upper plunger and burrholder, as described below, and the lower arm is provided at its outer extremity with a Vertical sleeve b which serves asa guide for the lower plunger, and also serves as a rivetholder.

Pivoted between the ears a on the rear portion of the column A is a vertical lever D, the lower end D of which is bent to extend forwardly through the foot of the column A and terminates in a suitable treadle d, and the upper end D of which is enlarged, as shown, and terminates in the rear portion of the hollow frame B. The lever is held with its lower portion adjacent to the column A,

so as to separate the plungers connected therewith by means of the spiral spring a, which the end of the lever, so as to hold the lever and plunger in a fixed position in relation to each other, and the lower plunger having similar collars g which connect it in the same manner with the lower lever. The upper lever F has a vertical slot f extending through it adjacent to the plunger G, and the lower portion of the slot extends longitudinally in ward, so as to form a shoulder f and an in clined portion f on the under side of the le-' ver, said parts being adapted to actuate the burr-set arm, as hereinafter described.

The lower end of the upper plunger G is concaved slightly, as shown at 9, so that it will easily head a rivet, and the plunger is provided on one side with a longitudinal slot 9 to guide the burr-set. mounted loosely on the upper plunger G, the

said burr-set being composed of three similar segments H, which extend below the lower end of the plunger and which are curved slightly inward, so that an opening h is formed in the lower end of the burr-set, the

opening being adapted to receive the point of the rivet. The burr-set is provided at its upper end with a collar h, through which extends a set-screw h, the said set-screw pro- The burr-set H is i ICO jecting into the slot g of the plunger G, and thus serving as a guide to prevent the burrset from twisting on the plunger. The burrset is normally pressed downward, so that its lower end will project beyond the lower end of the plunger by the spiral spring '5, which is interposed between the collar 71. and the lower collar g on the plunger.

A burr-holder J is suspended below the plunger G and burr-set H, so as to align therewith, the burr-holder being composed of the separable jaws J, which have an opening j between them to receive a rivet and which are provided with rearwardly-extendin g arms the rear portions of the arms beingpivoted on the guide-rod K and the arms and jaws being held normally together by the spring j which connects the two arms. The guiderod K is mounted loosely in the cross-heads b, and b is doubled upon itself at its upper portion, as shown at K in Fig. 2, and its upper end then extends downwardly through the cross-head Z). It is provided with a collar 7a, which is placed a short distance above the cross-head b and a spring is is interposed between the collar and the cross-head, so as to normally hold the guide-rod andthe burr-holder connected therewith in an elevated position. An elbow-lever L is pivoted on the rear portion of the collar h, the upper armZof the lever extending upwardly intothe slotted lever F and the lower arm Z of the lever extending rearwardly, as shown. A bent lever M is pivoted at its elbow on the stud N beneath the upper lever F, the said lever M having a rearwardly-extending portion M, adapted to be operated on by the enlarged upper end of the lever D, and the said lever M extends forwardly to a point directly beneath the lower arm of the lever L, the front end of the lever M carrying a set-screw M which is vertically adjustable therein and which is adapted to strike the lower arm of the lever L. A jaw O is pivoted on each side of the sleeve b which incloses the lower plunger G, the said jaws being pivoted on the parallel rods P and being curved toward each other at their upper ends, so as to meet centrally above the sleeve b and their meeting edges thus align with the upper and lower plungers. The under surfaces of the jaws are beveled slightly at their meeting point, as shown at 0, so that a rivet driven from below easily forces its way between the jaws. The jaws are held normally together by a spring 19, which extends from jaw to jaw. The front portion of the sleeve 11 is cut away slightly at its upper end, as best shown in Fig. 4, so that a rivet may be easily inserted therein.

Then the machine is to be operated, a rivetburr R is placed in the burr-holder J, and a rivet R is placed in the sleeve W, with the head of the rivet resting upon the upper end of plunger G. The material to be riveted is then inserted between the jaws O and the bu rr-holder and the operator steps upon the treadle d, thus forcing the lower portion of the lever D rearward and forcing the upper end of said lever forward. This movement forces the rear ends of the links E E forward and forces the forward ends of the links apart, thus actuating the main levers F and E and causing the plungers G and G to move toward each other. As the upper plunger descends, the burr-set I-I strikes upon the burr R and presses the burr-holder downward upon the material to be riveted, and at the same time the rivet R is forced through the jaws 0, through the material, and through the rivetburr. The downward movement of the burr-set II is caused by the shoulder f on the upper lever F striking the upper arm of the elbow-lever L; but when the burr-set has moved downward sufficiently to press the burr upon the material to be riveted and upon the rivet the upper end of the lever D will have advanced sutiiciently to strike the rear end M of the bent lever M, thus raising the forward end of the said lever and causing the set-screw M therein to strike the lower arm of the lever L, thus tilting the lever and causing the upper arm to extend vertically through the slot f in the lever F. This allows the upper plunger G to descend without further actuating the burr'set, and the plunger strikes upon the point of the rivet R and heads the rivet upon the rivet-burr. The operator then removes his foot from the treadle cl, and the spring a causes the main lever D and the other operative parts of the machine to resume their normal position. It will be observed that the downward pressure on the burr-set should be removed at about the time the upper plunger strikes the point of the rivet, and this may be easily accomplished by means of the set-screw M the said screw being turned so that it will actuate the lever L at any desired time.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A riveting-machine comprising two vertically-aligning plungers, a lever mechanism for forcing the plungers together, a sleeve inclosing the lower plunger, a pair of springpressed jaws arranged to meet above the lower plunger, a separable burrholder inter-' posed between the two plungers, a springpressed burrset mounted loosely on the upper plunger, a lever mechanism for forcing the burr-set downward, and a lever mechanism for releasing the burr-set, all substantially as described.

2. The combination, with the upper plunger and the slotted main lever for actuating the same, of the burr-set mounted loosely upon the plunger, an elbow-lever pivoted to the burr-set and having one arm entering the slotted lever and the other arm extending rearwardly, as shown, a bent lever pivoted below the main lever and provided with a rearwardly-extending end and a forwardlyextending end aligning with the lower arm of the burr-set lever, and a treadle-lever for 

